During the test creation, detects the unit testing framework the test code complies with,
whereupon suggests the Add <test framework> supportintention action,
provided that the framework is recognized as a PyCharm JavaScript library and is thus available in the IDE.

Configuring testing frameworks in a project

Enable the framework support on-the-fly during test creation. Write the test as required, position the cursor at it,
and press Alt+Enter.
Then choose the Add <test framework> support intention action from the list.